CN110106782B - Vertical force-measuring bridge support and force-measuring method - Google Patents
Vertical force-measuring bridge support and force-measuring method Download PDFInfo
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- CN110106782B CN110106782B CN201910345821.1A CN201910345821A CN110106782B CN 110106782 B CN110106782 B CN 110106782B CN 201910345821 A CN201910345821 A CN 201910345821A CN 110106782 B CN110106782 B CN 110106782B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 186
- 238000009434 installation Methods 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 31
- 239000010935 stainless steel Substances 0.000 description 31
- 229910052755 nonmetal Inorganic materials 0.000 description 21
- 230000008859 change Effects 0.000 description 12
- 238000002955 isolation Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 230000002441 reversible effect Effects 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
- E01D19/046—Spherical bearings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
- E01D19/047—Pot bearings
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Abstract
A vertical force-measuring bridge support and a force-measuring method thereof comprise an upper support, a seat plate, a bottom basin, a displacement amplifying device and a displacement sensor, and realize the conversion of bearing capacity and displacement of the upper part of the support. After the support bears the vertical force, downward displacement occurs at the center of the lower seat plate, the displacement is amplified through the displacement amplifying device and led out of the support, and the relation between the vertical loading force of the support and the reading of the displacement sensor is calibrated through a loading test, so that the purposes of force-displacement conversion and easy disassembly and replacement of the displacement measuring element are realized.
Description
Technical Field
The invention relates to the field of bridge supports, in particular to a vertical force-measuring bridge support and a force-measuring method.
Background
The bridge support is used as a main force transmission component of the upper structure and the lower structure of the bridge structure, the stress change of the support can reflect the whole operation condition of the bridge to a great extent, the acquisition of the bridge support, namely the vertical counter-force monitoring data of the bridge is realized, and the technical basis can be provided for the health monitoring of the bridge. Along with the increase of expressway and railway bridge construction in China year by year, the method has important practical significance for monitoring the vertical static load and dynamic load of the bridge bearing and for running the bridge.
Currently, bridge supports with a vertical force measuring function are few, and the force measuring is realized by arranging a standard sensor on the lateral side of a pressure-bearing wedge-shaped member of the support (patent number CN 102912772A); a vertical intelligent force measuring support (patent number CN 102032959A) mainly adopts a special-shaped part to set a resistance strain gauge so as to realize force measurement. The above patent all relates to ball-type support, and the sensor is as the whole support atress of supporting part load-bearing, and the force measurement scope is limited, and the size space requirement of structure is very big, and the support is heavier.
A simple bridge force measuring support (patent number CN 203741696U) is a common rubber basin-type support, and the force measuring function is realized through the change of mercury columns. The simple bridge force-measuring support (patent number CN 203741696U) and the simple bridge force-measuring support structure (patent number CN 105821760A) are common rubber basin-type support force-measuring, and the force-measuring function is realized by arranging a mercury column and a force-measuring meter respectively.
The force measuring support product mainly has the following defects:
(1) The support horizontally slides and vertically rotates to have an influence on vertical force measurement.
(2) The force measuring element is difficult to replace after reaching the service life, and the service life of the support is limited.
(3) Rubber materials are adopted, so that the rubber is easy to age and the service life is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a vertical force-measuring bridge support and a force-measuring method, which realize the conversion of bearing capacity and displacement at the upper part of the support. After the support bears the vertical force, downward displacement occurs at the center of the lower seat plate, the displacement is amplified through the displacement amplifying device and led out of the support, and the relation between the vertical loading force of the support and the reading of the displacement sensor is calibrated through a loading test, so that the purposes of force-displacement conversion and easy disassembly and replacement of the displacement measuring element are realized.
In order to achieve the technical purpose, the adopted technical scheme is as follows: the utility model provides a vertical dynamometry formula bridge support, including upper portion support, the bedplate, the end basin, displacement amplification device and displacement sensor, upper portion support, bedplate and end basin are from last to stacking setting down, the bottom surface of upper portion support is protruding sphere, the top surface of bedplate is with protruding sphere assorted concave sphere, the bedplate is for supporting the pterygoid lamina in end basin lateral wall top all around, be equipped with displacement amplification device installation space between the bottom surface of bedplate and the bottom surface upper surface of end basin, the displacement space that is linked together with displacement amplification device installation space has been seted up on the lateral wall of end basin, displacement amplification device includes the lever, connecting piece and support, the support is fixed in the displacement amplification device installation space, the lever penetrates in the displacement amplification device installation space through the displacement space, a fulcrum between the tip of lever and the focus of lever articulates on the support, the lever uses the support atress to rotate, the one end of lever is through connecting piece and the bottom surface center fixed connection of bedplate, the other end of lever corresponds the displacement sensor setting up on the lateral wall surface of end basin of the side basin of the lever, the focus of lever is located the lever and is close to displacement sensor.
One end of the lever connected with the connecting piece is located at a position lower than the other end of the lever.
The center of the lower part of the seat plate is provided with a cylindrical table which extends into the pelvic cavity of the bottom basin and is in clearance fit with the pelvic cavity of the bottom basin, and a displacement amplifying device installation space is arranged between the bottom surface of the cylindrical table and the upper surface of the bottom basin.
The section of the lever is a variable section, one end of the lever, which is connected with the seat board, is a thick end, and one end of the lever, which corresponds to the displacement sensor, is a thin end.
The connecting piece is a vertically arranged rod-shaped component, one end of the rod-shaped component is fixedly connected with the center of the bottom surface of the seat plate, and the other end of the rod-shaped component is pressed at the end part of the lever.
The end of the rod-shaped component and the end of the lever are cambered surfaces and curved surfaces which are matched.
A force measuring method of a vertical force measuring type bridge support, comprising the steps of loading a calibration loading force on an upper support of the vertical force measuring type bridge support according to claim 1, and reading a displacement sensor to obtain a relation between the calibration loading force and a displacement value of the displacement sensor; and reversely obtaining the vertical loading force value on the vertical force-measuring bridge support by the displacement value of the displacement sensor arranged on the vertical force-measuring bridge support according to the relation between the calibrated loading force and the displacement value of the displacement sensor.
The beneficial effects of the invention are as follows:
1) The displacement sensor is fixedly arranged at the side surface of the support bottom basin, so that the purposes of easy disassembly and convenient replacement are realized; the connecting wire is connected with external display equipment to realize real-time automatic data acquisition. The support bears vertical force and causes the elastic deformation of the seat plate, vertical displacement occurs on the bottom surface and is transmitted to the input end of the displacement amplifying device, the displacement sensor is enabled to sense more sensitive data through the amplifying effect of the displacement amplifying device, and then the vertical stress relation between the reading of the displacement sensor and the whole support is determined through vertical calibration, so that the conversion of force and displacement is completed.
2) The measurement of the support does not affect the normal use functions of the support at the upper part, namely the functions of vertical bearing, sliding in the sliding direction, limiting in the limiting direction and vertical rotation of the support; for the friction pair with the upper friction pair being a spherical surface, the vibration reducing and isolating function is realized under the earthquake effect.
3) The lower seat board and the seat board are used for transferring force, so that the basic function of the support is separated from the vertical force measuring function, and the influence of horizontal displacement, horizontal stress and vertical rotation on the vertical force measuring is effectively eliminated.
4) When the lever is installed, the heavy end of the lever is lifted, the light end is sunk under the pressure of the connecting piece, and when the displacement is amplified, the position relationship can enable the lower surface of the seat plate and the lever, and the lever and the limiting pin to be always in a compressed state, so that the influence of a fit clearance on displacement data is eliminated; the cross section of the lever is a variable cross section, the front end is thick, and the rear end is thin, so that the influence of bending deformation of the lever-shaped component on displacement data under the action of long-time dead weight is eliminated.
5) The front end of the lever is positioned at a low position during installation, the rear end of the lever is positioned at a high position, the installation space can be reduced, and meanwhile, the height of the bottom basin can be reduced.
Drawings
FIG. 1 is a schematic view of the structure of embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view of A-A of the structure of embodiment 1 of the present invention;
FIG. 3 is a schematic view of the structure of embodiment 2 of the present invention;
FIG. 4 is a cross-sectional view of A-A of the structure of embodiment 2 of the present invention;
FIG. 5 is a schematic view showing the structure of embodiment 3 of the present invention;
FIG. 6 is a cross-sectional view of A-A of the structure of embodiment 3 of the present invention;
FIG. 7 is a schematic view showing the structure of embodiment 4 of the present invention;
FIG. 8 is a cross-sectional view of A-A of the structure of example 4 of the present invention;
FIG. 9 is a schematic view showing the structure of embodiment 5 of the present invention;
FIG. 10 is a cross-sectional view of A-A of the structure of example 5 of the present invention;
FIG. 11 is a schematic view showing the structure of embodiment 6 of the present invention;
FIG. 12 is a cross-sectional view of A-A of the structure of example 6 of the present invention;
in the figure, 1, an upper seat board, 2, an upper stainless steel slide board, 3, an upper non-metal slide board, 4, a middle seat board, 5, a lower spherical stainless steel slide board, 6, a lower spherical non-metal slide board, 7, a lower seat board, 8, a seat board, 8-1, a wing board, 8-2, a cylindrical table, 9, a displacement sensor, 10, a displacement amplifying device, 10-1, a lever, 10-2, a bracket, 10-3 connecting pieces, 11, a bottom basin, 12, a guiding stainless steel slide board, 13 and a guiding non-metal slide board.
Detailed Description
As shown in fig. 1-12, the vertical force-measuring bridge support comprises an upper support, a seat plate 8, a bottom basin 11, a displacement amplifying device 10 and a displacement sensor 9, wherein the upper support comprises an upper seat plate 1, a middle seat plate 4, a lower seat plate 7 and friction pairs among the upper seat plate 1, the middle seat plate 4 and the lower seat plate 7.
The upper support, the seat plate 8 and the bottom basin 11 are stacked from top to bottom, the bottom surface of the upper support is a convex spherical surface, the top surface of the seat plate 8 is a concave spherical surface matched with the convex spherical surface, the upper support is matched with the concave spherical surface of the top surface of the seat plate and does not generate relative movement, and the upper support has the function of transmitting vertical force.
The upper support vertically bears a total of 2 friction pairs. The upper seat board and the middle seat board are provided with 1 plane or sphere upper friction pair (an upper stainless steel sliding board and an upper nonmetal sliding board), and the middle seat board and the lower seat board are provided with 1 sphere friction pair (a lower sphere stainless steel sliding board and a lower sphere nonmetal sliding board); the 2 vertical pressure-bearing friction pairs realize the vertical bearing, sliding and rotating functions of the support; the upper friction pair is a spherical friction pair, and the shock absorption and isolation functions are realized under the earthquake action. And through a vertical calibration test, determining the integral vertical stress relation between the reading of the displacement sensor and the support, and realizing the conversion of vertical stress and displacement.
The seat board 8 is provided with wing plates 8-1 supported above the side wall of the bottom basin 11 at the periphery, the wing plates 8-1 can be arranged into an annular structure, and vertical displacement is provided for the input end of the displacement amplifying device through elastic deformation of annular wings during vertical bearing.
The upper surface of the bottom basin 11 is of an annular shape and a hollow structure, the annular surface is used for bearing vertical load, and the hollow part provides an installation space for the displacement amplifying device. And holes are formed in proper positions on the side surfaces of the bottom basin, so that a lever of the amplifying device can conveniently pass through the holes.
A displacement amplifying device installation space is arranged between the bottom surface of the seat plate 8 and the upper surface of the bottom basin 11, a displacement space communicated with the displacement amplifying device installation space is formed in the side wall of the bottom basin 11, the displacement amplifying device 10 comprises a lever 10-1, a connecting piece 10-3 and a support 10-2, the support 10-2 is fixed in the displacement amplifying device installation space, the lever 10-1 penetrates into the displacement amplifying device installation space through the displacement space, a fulcrum between the end part of the lever 10-1 and the gravity center of the lever 10-1 is hinged to the support 10-2, the lever 10-1 is stressed to rotate by taking the support 10-2 as the fulcrum, one end of the lever 10-1 is fixedly connected with the bottom surface center of the seat plate 8 through the connecting piece 10-3, the other end of the lever 10-1 is correspondingly arranged on the side wall surface of the bottom basin 11, and the gravity center of the lever 10-1 is positioned at one end of the lever 10-1 close to the displacement sensor 9. That is, one end of the lever of the bracket and the displacement sensor is heavier than one end of the lever between the bracket and the connecting piece, and the heavy end can reset the light end through dead weight when the light end falls down and is not subjected to loading force.
When the lever is installed and is not subjected to loading force, the two ends of the lever are positioned as follows:
one end of the lever 10-1 connected with the connecting piece 10-3 is located at a position higher than the other heavy end of the lever 10-1, namely, the light end of the lever 10-1 is lifted upwards by the heavy end, when the light end is loaded by the upper support, the light end moves downwards, the heavy end lifts upwards, and the displacement sensor detects the change of the position of the lever. At this time, the height of the installation space is required to be set higher according to the height of the lifting of the light end of the lever 10-1, the height of the pressing of the heavy end is low, and the whole height of the bottom basin is required to be heightened in order to ensure the opening position of the displacement space.
And (II) the end of the lever 10-1 connected to the connecting member 10-3 is located at a position lower than the other heavy end of the lever 10-1. Namely, the light end of the lever 10-1 is depressed by the upper support, the heavy end is lifted up by taking the support as a fulcrum, when the light end is subjected to the loading force of the upper support, the position of the light end is continuously moved down, the heavy end is lifted up, and the displacement sensor detects the position change of the lever. At this time, the height of the installation space is required to be set low according to the height of the light end of the lever 10-1 pressed down, and the opening position of the displacement space is not required to be too high, so that the overall height of the bottom tub is reduced.
The center of the lower part of the seat plate 8 is provided with a cylinder table 8-2, the cylinder table 8-2 stretches into the basin cavity of the bottom basin 11 and is in clearance fit with the basin cavity of the bottom basin 11, and a displacement amplifying device installation space is arranged between the bottom surface of the cylinder table 8-2 and the upper surface of the bottom basin 11. The cylinder platform 8-2 can limit the bottom plate 8, and the center of the bottom surface of the cylinder platform can be connected with a connecting piece through a connecting bolt, so that the transmission of force and displacement is realized.
The section of the lever 10-1 is a variable section, one end of the lever 10-1 connected with the seat plate 8 is a thick end, and one end of the lever 10-1 corresponding to the displacement sensor 9 is a thin end. The arrangement does not change the gravity center position, after installation, the gravity center is positioned at one side close to the displacement sensor, deformation is easy to occur under the action of dead weight for a long time, and after the gravity center is changed into a thin end, the gravity center has a variable cross section, and the influence of bending deformation of the rod-shaped component under the action of dead weight for time on displacement data is eliminated.
The connecting piece 10-3 is a vertically arranged rod-shaped component, one end of the rod-shaped component is fixedly connected with the center of the bottom surface of the seat plate 8, and the other end of the rod-shaped component is pressed at the end part of the lever 10-1. At this time, the position of the end of the installed lever 10-1 connected with the connecting piece 10-3 is lower than the position of the other heavy end of the lever 10-1, and the lever is hinged with the bracket through the limiting pin and other parts when in use, so that a fit clearance is easy to generate, and the lever is tightly pressed in real time in a pressing mode through the connecting piece 10-3, so that the lever, the limiting pin and the bracket are always in a pressing state, the influence of the fit clearance on displacement data is eliminated, and the fit clearance cannot influence the measured displacement difference when the lever is subjected to the change of the loading force position.
The end of the rod-shaped component and the end of the lever 10-1 are cambered surfaces and curved surfaces which are matched. Thus, when the pressure is applied, the fit between the two is ensured, and the separation can not occur.
A force measuring method of a vertical force measuring type bridge support, comprising the steps of loading a calibration loading force on an upper support of the vertical force measuring type bridge support according to claim 1, and reading a displacement sensor to obtain a relation between the calibration loading force and a displacement value of the displacement sensor; and reversely obtaining the vertical loading force value on the vertical force-measuring bridge support by the displacement value of the displacement sensor arranged on the vertical force-measuring bridge support according to the relation between the calibrated loading force and the displacement value of the displacement sensor.
Example 1
A multidirectional movable vertical force measuring ball-shaped steel support is provided, as shown in figures 1 and 2. The device mainly comprises an upper seat board 1, an upper stainless steel sliding board 2, an upper non-metal sliding board 3, a middle seat board 4, a lower spherical stainless steel sliding board 5, a lower spherical non-metal sliding board 6, a lower seat board 7, a seat board 8, a displacement sensor 9, a displacement amplifying device 10, a bottom basin 11 and other parts. A plane friction pair (comprising an upper stainless steel slide plate 2 and an upper nonmetallic slide plate 3) is arranged between the upper seat plate 1 and the middle seat plate 4; the middle seat board 4 and the lower seat board 7 are provided with spherical friction pairs (the lower spherical stainless steel slide board 5 and the lower spherical nonmetal slide board 6 are formed), and the plane friction pairs and the spherical friction pairs form vertical bearing friction pairs of the support together, so that the vertical bearing friction pair has the functions of vertical bearing, vertical and horizontal bridge sliding and vertical rotation.
The lowermost surface of the lower cylindrical stage of the seat plate 8 is provided with a rod-shaped member for transmitting displacement to the displacement amplifying device 10 via a connecting bolt, and is an input end of displacement. Holes or grooves are formed in proper positions on the side surface of the bottom basin 11, so that the lever passing through of the displacement amplifying device 10 and the vertical displacement change are facilitated. The displacement sensor 9 is placed at the side surface of the bottom basin 11 and is fixed by a connecting bolt. The connecting wire of the displacement sensor 9 is connected with external display equipment to finish the acquisition of the vertical displacement value data of the output end of the amplifying device. Through a vertical calibration test, the relation between the measured value of the displacement sensor 9 and the whole vertical stress of the support is determined, and the whole vertical stress condition of the support is obtained through the reverse pushing of the measured value of the displacement sensor 9 when the final support is used, so that the support has a vertical force measuring function.
The multidirectional movable vertical force measuring spherical steel support can realize the vertical bearing, horizontal longitudinal bridge and transverse bridge sliding and support vertical rotation functions under normal conditions. Meanwhile, the displacement sensor 9 is arranged outside the support, so that the support is convenient to assemble, disassemble and replace, and the support always has a vertical force measuring function in the whole operation process.
Example 2
A one-way movable vertical force-measuring spherical steel support is provided, as shown in figures 3 and 4. The device mainly comprises an upper seat board 1, an upper stainless steel sliding board 2, an upper non-metal sliding board 3, a middle seat board 4, a lower spherical stainless steel sliding board 5, a lower spherical non-metal sliding board 6, a lower seat board 7, a seat board 8, a displacement sensor 9, a displacement amplifying device 10, a bottom basin 11 and other parts. A plane friction pair (comprising an upper stainless steel slide plate 2 and an upper nonmetallic slide plate 3) is arranged between the upper seat plate 1 and the middle seat plate 4; a spherical friction pair (composed of a lower spherical stainless steel slide plate 5 and a lower spherical nonmetallic slide plate 6) is arranged between the middle seat plate 4 and the lower seat plate 7, and a guiding friction pair (composed of a guiding stainless steel slide plate 12 and a guiding nonmetallic slide plate 13) is arranged in two horizontal limiting directions of the bottom basin 11 and the upper seat plate 1. The plane friction pair and the spherical friction pair jointly form a vertical pressure-bearing friction pair of the support, and the vertical pressure-bearing friction pair has the functions of vertical bearing, sliding in the main displacement direction and vertical rotation; the guiding friction pair plays a role in limiting the support in the limiting direction and sliding in the sliding direction.
The lowermost surface of the lower cylindrical stage of the seat plate 8 is provided with a rod-shaped member for transmitting displacement to the displacement amplifying device 10 via a connecting bolt, and is an input end of displacement. Holes or grooves are formed in proper positions on the side surface of the bottom basin 11, so that the lever passing through of the displacement amplifying device 10 and the vertical displacement change are facilitated. The displacement sensor 9 is placed at the side surface of the bottom basin 11 and is fixed by a connecting bolt. The connecting wire of the displacement sensor 9 is connected with external display equipment to finish the acquisition of the vertical displacement value data of the output end of the amplifying device. Through a vertical calibration test, the relation between the measured value of the displacement sensor 9 and the whole vertical stress of the support is determined, and the whole vertical stress condition of the support is obtained through the reverse pushing of the measured value of the displacement sensor 9 when the final support is used, so that the support has a vertical force measuring function.
The unidirectional movable vertical force measurement spherical steel support of the embodiment can realize the functions of vertical bearing, main displacement to sliding, limiting direction limiting and vertical rotation of the support under normal conditions, and meanwhile, the displacement sensor 9 is arranged outside the support, so that the support is convenient to disassemble, assemble and replace, and has the vertical force measurement function all the time in the whole operation process.
Example 3
A fixed vertical force measuring spherical steel support is given as shown in fig. 5 and 6. The device mainly comprises an upper seat board 1, an upper stainless steel sliding board 2, an upper non-metal sliding board 3, a middle seat board 4, a lower spherical stainless steel sliding board 5, a lower spherical non-metal sliding board 6, a lower seat board 7, a seat board 8, a displacement sensor 9, a displacement amplifying device 10, a bottom basin 11 and other parts. A plane friction pair (comprising an upper stainless steel slide plate 2 and an upper nonmetallic slide plate 3) is arranged between the upper seat plate 1 and the middle seat plate 4; a spherical friction pair (composed of a lower spherical stainless steel slide plate 5 and a lower spherical nonmetallic slide plate 6) is arranged between the middle seat plate 4 and the lower seat plate 7; the plane friction pair and the spherical friction pair jointly form a vertical pressure-bearing friction pair of the support, and the vertical bearing friction pair has vertical bearing and vertical rotation functions. The basin ring of the upper seat board 1 and the bottom basin 11 are arranged in a small gap, and play a role in limiting and fixing the support on the periphery.
The lowermost surface of the lower cylindrical stage of the seat plate 8 is provided with a rod-shaped member for transmitting displacement to the displacement amplifying device 10 via a connecting bolt, and is an input end of displacement. Holes are formed in proper positions on the side surface of the bottom basin 11, so that the lever of the displacement amplifying device 10 can pass through and the vertical displacement can be changed. The displacement sensor 9 is placed at the side surface of the bottom basin 11 and is fixed by a connecting bolt. The connecting wire of the displacement sensor 9 is connected with external display equipment to finish the acquisition of the vertical displacement value data of the output end of the amplifying device. Through a vertical calibration test, the relation between the measured value of the displacement sensor 9 and the whole vertical stress of the support is determined, and the whole vertical stress condition of the support is obtained through the reverse pushing of the measured value of the displacement sensor 9 when the final support is used, so that the support has a vertical force measuring function.
The fixed vertical force measurement ball steel support of this embodiment can realize vertical bearing, level to spacing and support vertical rotation function under the normal condition, and displacement sensor 9 arranges the support outside simultaneously, has made things convenient for the dismouting to change for the support possesses vertical force measurement function throughout the operation in-process.
Example 4
The multi-directional movable vertical force-measuring hyperboloid spherical shock-absorbing and isolating support is provided, as shown in figures 7 and 8. The device mainly comprises an upper seat board 1, an upper stainless steel sliding board 2, an upper non-metal sliding board 3, a middle seat board 4, a lower spherical stainless steel sliding board 5, a lower spherical non-metal sliding board 6, a lower seat board 7, a seat board 8, a displacement sensor 9, a displacement amplifying device 10, a bottom basin 11 and other parts. An upper spherical friction pair (comprising an upper stainless steel slide plate 2 and an upper nonmetallic slide plate 3) is arranged between the upper seat plate 1 and the middle seat plate 4; the lower spherical friction pair (comprising a lower spherical stainless steel slide plate 5 and a lower spherical nonmetal slide plate 6) is arranged between the middle seat plate 4 and the lower seat plate 7, and the two upper and lower spherical friction pairs jointly form a vertical pressure-bearing friction pair of the support, so that the vertical bearing friction pair has the functions of vertical bearing, longitudinal and transverse bridge sliding and vertical rotation. During an earthquake, the support realizes horizontal reciprocating sliding through the synthesis of the double spherical surfaces, and in the reciprocating sliding process, the earthquake energy is dissipated through the friction resistance of the sliding surfaces, the self-vibration period of the structure is prolonged, and the earthquake reduction and isolation effects are achieved; after the earthquake, the dead weight of the upper structure forms restoring force to reset the support.
The lowermost surface of the lower cylindrical stage of the seat plate 8 is provided with a rod-shaped member for transmitting displacement to the displacement amplifying device 10 via a connecting bolt, and is an input end of displacement. Holes or grooves are formed in proper positions on the side surface of the bottom basin 11, so that the lever passing through of the displacement amplifying device 10 and the vertical displacement change are facilitated. The displacement sensor 9 is placed at the side surface of the bottom basin 11 and is fixed by a connecting bolt. The connecting wire of the displacement sensor 9 is connected with external display equipment to finish the acquisition of the vertical displacement value data of the output end of the amplifying device. Through a vertical calibration test, the relation between the measured value of the displacement sensor 9 and the whole vertical stress of the support is determined, and the whole vertical stress condition of the support is obtained through the reverse pushing of the measured value of the displacement sensor 9 when the final support is used, so that the support has a vertical force measuring function.
Under normal conditions, the multi-direction movable vertical force-measuring hyperboloid spherical seismic reduction and isolation support can realize the functions of vertical bearing, horizontal longitudinal bridge sliding and horizontal bridge sliding and support vertical rotation; the functions of shock absorption, isolation and automatic reset after earthquake are realized during the earthquake; meanwhile, the displacement sensor 9 is arranged outside the support, so that the support is convenient to assemble, disassemble and replace, and the support always has a vertical force measuring function in the whole operation process.
Example 5
A hyperboloid spherical seismic reduction and isolation support with unidirectional movement and vertical force measurement is provided, as shown in figures 9 and 10. The device mainly comprises an upper seat board 1, an upper stainless steel sliding board 2, an upper non-metal sliding board 3, a middle seat board 4, a lower spherical stainless steel sliding board 5, a lower spherical non-metal sliding board 6, a lower seat board 7, a seat board 8, a displacement sensor 9, a displacement amplifying device 10, a bottom basin 11 and other parts. An upper spherical friction pair (comprising an upper stainless steel slide plate 2 and an upper nonmetallic slide plate 3) is arranged between the upper seat plate 1 and the middle seat plate 4; a lower spherical friction pair (composed of a lower spherical stainless steel slide plate 5 and a lower spherical nonmetal slide plate 6) is arranged between the middle seat plate 4 and the lower seat plate 7, and guiding friction pairs (composed of a guiding stainless steel slide plate 12 and a guiding nonmetal slide plate 13) are arranged in two horizontal limiting directions of the bottom basin and the upper seat plate 1. The two spherical friction pairs jointly form a vertical pressure-bearing friction pair of the support, and the vertical pressure-bearing friction pair has the functions of vertical bearing, sliding in the main displacement direction and vertical rotation; the guiding friction pair plays a role in limiting the support in the limiting direction and sliding in the sliding direction. During an earthquake, the limiting plate is sheared off, the support achieves horizontal reciprocating sliding through the combination of the double spherical surfaces, earthquake energy is dissipated through friction resistance of the sliding surface in the reciprocating sliding process, the self-vibration period of the structure is prolonged, and the earthquake reduction and isolation effect is achieved; after the earthquake, the dead weight of the upper structure forms restoring force to reset the support.
The lowermost surface of the lower cylindrical stage of the seat plate 8 is provided with a rod-shaped member for transmitting displacement to the displacement amplifying device 10 via a connecting bolt, and is an input end of displacement. Holes or grooves are formed in proper positions on the side surface of the bottom basin 11, so that the lever passing through of the displacement amplifying device 10 and the vertical displacement change are facilitated. The displacement sensor 9 is placed at the side surface of the bottom basin 11 and is fixed by a connecting bolt. The connecting wire of the displacement sensor 9 is connected with external display equipment to finish the acquisition of the vertical displacement value data of the output end of the amplifying device. Through a vertical calibration test, the relation between the measured value of the displacement sensor 9 and the whole vertical stress of the support is determined, and the whole vertical stress condition of the support is obtained through the reverse pushing of the measured value of the displacement sensor 9 when the final support is used, so that the support has a vertical force measuring function.
The hyperboloid spherical seismic reduction and isolation support with unidirectional movable vertical force measurement can realize the functions of vertical bearing, main displacement sliding, limiting in the limiting direction and vertical rotation of the support under normal conditions; the functions of shock absorption, isolation and automatic reset after earthquake are realized during the earthquake; meanwhile, the displacement sensor 9 is arranged outside the support, so that the support is convenient to assemble, disassemble and replace, and the support always has a vertical force measuring function in the whole operation process.
Example 6
A fixed vertical force-measuring hyperboloid spherical shock-absorbing and isolating support is provided, as shown in figures 11 and 12. The device mainly comprises an upper seat board 1, an upper stainless steel sliding board 2, an upper non-metal sliding board 3, a middle seat board 4, a lower spherical stainless steel sliding board 5, a lower spherical non-metal sliding board 6, a lower seat board 7, a seat board 8, a displacement sensor 9, a displacement amplifying device 10, a bottom basin 11 and other parts. An upper spherical friction pair (comprising an upper stainless steel slide plate 2 and an upper nonmetallic slide plate 3) is arranged between the upper seat plate 1 and the middle seat plate 4; a lower spherical friction pair (composed of a lower spherical stainless steel slide plate 5 and a lower spherical nonmetallic slide plate 6) is arranged between the middle seat plate 4 and the lower seat plate 7. The two spherical friction pairs jointly form a vertical pressure-bearing friction pair of the support, and the vertical bearing friction pair has a vertical bearing and vertical rotation function; the basin ring of the upper seat board 1 and the bottom basin 11 are arranged in a small gap, and play a role in limiting and fixing the support on the periphery. During an earthquake, the limiting plate is sheared off, the support achieves horizontal reciprocating sliding through the combination of the double spherical surfaces, earthquake energy is dissipated through friction resistance of the sliding surface in the reciprocating sliding process, the self-vibration period of the structure is prolonged, and the earthquake reduction and isolation effect is achieved; after the earthquake, the dead weight of the upper structure forms restoring force to reset the support.
The lowermost surface of the lower cylindrical stage of the seat plate 8 is provided with a rod-shaped member for transmitting displacement to the displacement amplifying device 10 via a connecting bolt, and is an input end of displacement. Holes or grooves are formed in proper positions on the side surface of the bottom basin 11, so that the lever passing through of the displacement amplifying device 10 and the vertical displacement change are facilitated. The displacement sensor 9 is placed at the side surface of the bottom basin 11 and is fixed by a connecting bolt. The connecting wire of the displacement sensor 9 is connected with external display equipment to finish the acquisition of the vertical displacement value data of the output end of the amplifying device. Through a vertical calibration test, the relation between the measured value of the displacement sensor 9 and the whole vertical stress of the support is determined, and the whole vertical stress condition of the support is obtained through the reverse pushing of the measured value of the displacement sensor 9 when the final support is used, so that the support has a vertical force measuring function.
The fixed vertical force-measuring hyperboloid spherical seismic reduction and isolation support can realize the functions of vertical bearing, horizontal limiting and vertical rotation of the support under normal conditions; the functions of shock absorption, isolation and automatic reset after earthquake are realized during the earthquake; meanwhile, the displacement sensor 9 is arranged outside the support, so that the support is convenient to assemble, disassemble and replace, and the support always has a vertical force measuring function in the whole operation process.
Claims (7)
1. A vertical force measurement type bridge support is characterized in that: the device comprises an upper support, a seat plate (8), a bottom basin (11), a displacement amplifying device (10) and a displacement sensor (9), wherein the upper support, the seat plate (8) and the bottom basin (11) are arranged in a stacked manner from top to bottom, the bottom surface of the upper support is a convex spherical surface, the top surface of the seat plate (8) is a concave spherical surface matched with the convex spherical surface, wing plates (8-1) supported above the side wall of the bottom basin (11) are arranged around the seat plate (8), a displacement amplifying device mounting space is arranged between the bottom surface of the seat plate (8) and the upper surface of the bottom basin (11), the side wall of the bottom basin (11) is provided with a displacement space communicated with the displacement amplifying device mounting space, the displacement amplifying device (10) comprises a lever (10-1), a connecting piece (10-3) and a bracket (10-2), the bracket (10-2) is fixed in the displacement amplifying device mounting space, the lever (10-1) penetrates into the displacement amplifying device mounting space through the displacement space, one end part between the end part of the lever (10-1) and the gravity center of the lever (10-1) is hinged on the bracket (10-2) and is connected with the pivot point (10-1) through the pivot point (10-1) to be a pivot point (10-3), the other end of the lever (10-1) is correspondingly arranged on the displacement sensor (9) on the side wall surface of the bottom basin (11), and the gravity center of the lever (10-1) is positioned at one end of the lever (10-1) close to the displacement sensor (9), so that one end of the lever of the bracket (10-2) and the displacement sensor (9) is heavier than one end of the lever between the bracket (10-2) and the connecting piece (10-3).
2. A vertical load-measuring bridge support according to claim 1, wherein: one end of the lever (10-1) connected with the connecting piece (10-3) is positioned lower than the other end of the lever (10-1).
3. A vertical load-measuring bridge support according to claim 1, wherein: the center of the lower part of the seat plate (8) is provided with a cylindrical table (8-2), the cylindrical table (8-2) stretches into the pelvic cavity of the bottom basin (11) and is in clearance fit with the pelvic cavity of the bottom basin (11), and a displacement amplifying device installation space is arranged between the bottom surface of the cylindrical table (8-2) and the upper surface of the bottom basin (11).
4. A vertical load-measuring bridge abutment as claimed in claim 1 or claim 2, wherein: the section of the lever (10-1) is a variable section, one end of the lever (10-1) connected with the seat plate (8) is a thick end, and one end of the lever (10-1) corresponding to the displacement sensor (9) is a thin end under the condition of not changing the gravity center.
5. A vertical load-measuring bridge abutment as claimed in claim 1 or claim 2, wherein: the connecting piece (10-3) is a vertically arranged rod-shaped component, one end of the rod-shaped component is fixedly connected with the center of the bottom surface of the seat board (8), and the other end of the rod-shaped component is pressed at the end part of the lever (10-1).
6. A vertical load-measuring bridge support according to claim 5, wherein: the end of the rod-shaped component and the end of the lever (10-1) are cambered surfaces and curved surfaces which are matched.
7. A method for measuring force of a vertical force-measuring bridge bearing according to claim 1, wherein: loading a calibration loading force on an upper support of the vertical force-measuring bridge support according to claim 1, and reading a displacement sensor to obtain a relation between the calibration loading force and a displacement value of the displacement sensor; and reversely obtaining the vertical loading force value on the vertical force-measuring bridge support by the displacement value of the displacement sensor arranged on the vertical force-measuring bridge support according to the relation between the calibrated loading force and the displacement value of the displacement sensor.
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| CN211395333U (en) * | 2019-11-20 | 2020-09-01 | 北京铁科首钢轨道技术股份有限公司 | Vertical dynamometry ball-type support |
| CN111999019B (en) * | 2020-08-26 | 2021-05-25 | 成都济通路桥科技有限公司 | Novel calibration method for bridge support device in operation period |
| CN112284592B (en) * | 2020-10-20 | 2022-06-10 | 中国铁路设计集团有限公司 | Force measuring method for high-precision vertical force measuring longitudinal movable or multidirectional movable spherical support |
| CN112146803B (en) * | 2020-10-20 | 2022-06-10 | 中国铁路设计集团有限公司 | Force measuring method for high-precision vertical force measurement of transversely movable or fixed spherical support |
| CN112748067B (en) * | 2020-12-23 | 2024-06-04 | 济通智能装备股份有限公司 | Calibration method for force measuring device and support based on friction coefficient measurement |
| CN112484912B (en) * | 2020-10-27 | 2022-08-09 | 成都济通路桥科技有限公司 | Parallel calibration method and system for force measurement support in service state |
| CN112729635B (en) * | 2021-02-20 | 2022-04-15 | 河北省建筑科学研究院有限公司 | Computer-based support and monitoring method for monitoring stress state of steel-concrete composite beam in real time |
| CN113897856B (en) * | 2021-09-09 | 2023-02-07 | 中船双瑞(洛阳)特种装备股份有限公司 | Tension-compression force measurement support |
| CN114323388B (en) * | 2022-01-19 | 2024-01-23 | 福州大学 | Force measuring bridge support and force measuring method |
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